[graphite] Add Vulkan Windows Debug test job

Change-Id: Idaa506c1d958c79245f9a7191e52a0dd94d79592
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/714636
Reviewed-by: Nicolette Prevost <nicolettep@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
3 files changed